ASoC: dapm: Add a helper to get the CODEC for DAPM kcontrol

We use the same 3 lines to get the CODEC for a kcontrol in a quite a few places.
This patch puts them into a common helper function. Having this encapsulated in
a helper function will also make it more easier to eventually change the data
layout of the kcontrol's private data.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

8 files changed, 34 insertions, 40 deletions

diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index 3397292d94c8..ebfae8f3fda7 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -427,6 +427,8 @@ void dapm_mark_io_dirty(struct snd_soc_dapm_context *dapm);
 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
         struct snd_soc_dapm_widget_list **list);
 
+struct snd_soc_codec *snd_soc_dapm_kcontrol_codec(struct snd_kcontrol *kcontrol);
+
 /* dapm widget types */
 enum snd_soc_dapm_type {
         snd_soc_dapm_input = 0,         /* input pin */
diff --git a/sound/soc/codecs/tlv320aic3x.c b/sound/soc/codecs/tlv320aic3x.c
index 1325c0c0df50..fec0db04262d 100644
--- a/sound/soc/codecs/tlv320aic3x.c
+++ b/sound/soc/codecs/tlv320aic3x.c
@@ -138,8 +138,7 @@ static const u8 aic3x_reg[AIC3X_CACHEREGNUM] = {
 static int snd_soc_dapm_put_volsw_aic3x(struct snd_kcontrol *kcontrol,
                                         struct snd_ctl_elem_value *ucontrol)
 {
-        struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-        struct snd_soc_dapm_widget *widget = wlist->widgets[0];
+        struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
         struct soc_mixer_control *mc =
                 (struct soc_mixer_control *)kcontrol->private_value;
         unsigned int reg = mc->reg;
@@ -165,14 +164,14 @@ static int snd_soc_dapm_put_volsw_aic3x(struct snd_kcontrol *kcontrol,
         mask <<= shift;
         val <<= shift;
 
-        change = snd_soc_test_bits(widget->codec, val, mask, reg);
+        change = snd_soc_test_bits(codec, val, mask, reg);
         if (change) {
                 update.kcontrol = kcontrol;
                 update.reg = reg;
                 update.mask = mask;
                 update.val = val;
 
-                snd_soc_dapm_mixer_update_power(widget->dapm, kcontrol, connect,
+                snd_soc_dapm_mixer_update_power(&codec->dapm, kcontrol, connect,
                         &update);
         }
 
diff --git a/sound/soc/codecs/twl6040.c b/sound/soc/codecs/twl6040.c
index 44621ddc332d..d6c5bf14179a 100644
--- a/sound/soc/codecs/twl6040.c
+++ b/sound/soc/codecs/twl6040.c
@@ -437,9 +437,7 @@ static irqreturn_t twl6040_audio_handler(int irq, void *data)
 static int twl6040_soc_dapm_put_vibra_enum(struct snd_kcontrol *kcontrol,
         struct snd_ctl_elem_value *ucontrol)
 {
-        struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-        struct snd_soc_dapm_widget *widget = wlist->widgets[0];
-        struct snd_soc_codec *codec = widget->codec;
+        struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
         unsigned int val;
 
diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c
index fa24cedee687..eebcb1da3b7b 100644
--- a/sound/soc/codecs/wm8903.c
+++ b/sound/soc/codecs/wm8903.c
@@ -364,9 +364,7 @@ static void wm8903_seq_notifier(struct snd_soc_dapm_context *dapm,
 static int wm8903_class_w_put(struct snd_kcontrol *kcontrol,
                               struct snd_ctl_elem_value *ucontrol)
 {
-        struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-        struct snd_soc_dapm_widget *widget = wlist->widgets[0];
-        struct snd_soc_codec *codec = widget->codec;
+        struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
         struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec);
         u16 reg;
         int ret;
diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index ba832b77c543..eee2a01f2691 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -1437,9 +1437,7 @@ SOC_DAPM_SINGLE("AIF1.1 Switch", WM8994_DAC2_RIGHT_MIXER_ROUTING,
 static int wm8994_put_class_w(struct snd_kcontrol *kcontrol,
                               struct snd_ctl_elem_value *ucontrol)
 {
-        struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-        struct snd_soc_dapm_widget *w = wlist->widgets[0];
-        struct snd_soc_codec *codec = w->codec;
+        struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
         int ret;
 
         ret = snd_soc_dapm_put_volsw(kcontrol, ucontrol);
diff --git a/sound/soc/codecs/wm8995.c b/sound/soc/codecs/wm8995.c
index 90a65c427541..da2899e6c401 100644
--- a/sound/soc/codecs/wm8995.c
+++ b/sound/soc/codecs/wm8995.c
@@ -549,12 +549,9 @@ static int check_clk_sys(struct snd_soc_dapm_widget *source,
 static int wm8995_put_class_w(struct snd_kcontrol *kcontrol,
                               struct snd_ctl_elem_value *ucontrol)
 {
-        struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-        struct snd_soc_dapm_widget *w = wlist->widgets[0];
-        struct snd_soc_codec *codec;
+        struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
         int ret;
 
-        codec = w->codec;
         ret = snd_soc_dapm_put_volsw(kcontrol, ucontrol);
         wm8995_update_class_w(codec);
         return ret;
diff --git a/sound/soc/codecs/wm_hubs.c b/sound/soc/codecs/wm_hubs.c
index 2d9e099415a5..8b50e5958de5 100644
--- a/sound/soc/codecs/wm_hubs.c
+++ b/sound/soc/codecs/wm_hubs.c
@@ -699,9 +699,7 @@ EXPORT_SYMBOL_GPL(wm_hubs_update_class_w);
 static int class_w_put_volsw(struct snd_kcontrol *kcontrol,
                               struct snd_ctl_elem_value *ucontrol)
 {
-        struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-        struct snd_soc_dapm_widget *widget = wlist->widgets[0];
-        struct snd_soc_codec *codec = widget->codec;
+        struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
         int ret;
 
         ret = snd_soc_dapm_put_volsw(kcontrol, ucontrol);
@@ -721,9 +719,7 @@ static int class_w_put_volsw(struct snd_kcontrol *kcontrol,
 static int class_w_put_double(struct snd_kcontrol *kcontrol,
                               struct snd_ctl_elem_value *ucontrol)
 {
-        struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-        struct snd_soc_dapm_widget *widget = wlist->widgets[0];
-        struct snd_soc_codec *codec = widget->codec;
+        struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
         int ret;
 
         ret = snd_soc_dapm_put_enum_double(kcontrol, ucontrol);
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 5db8df2f8866..b18ac5b1cc2e 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -174,6 +174,17 @@ static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
         return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
 }
 
+/**
+ * snd_soc_dapm_kcontrol_codec() - Returns the codec associated to a kcontrol
+ * @kcontrol: The kcontrol
+ */
+struct snd_soc_codec *snd_soc_dapm_kcontrol_codec(struct snd_kcontrol *kcontrol)
+{
+        struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
+        return wlist->widgets[0]->codec;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_codec);
+
 static void dapm_reset(struct snd_soc_card *card)
 {
         struct snd_soc_dapm_widget *w;
@@ -2617,8 +2628,7 @@ EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
         struct snd_ctl_elem_value *ucontrol)
 {
-        struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-        struct snd_soc_dapm_widget *widget = wlist->widgets[0];
+        struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
         struct soc_mixer_control *mc =
                 (struct soc_mixer_control *)kcontrol->private_value;
         unsigned int reg = mc->reg;
@@ -2628,12 +2638,12 @@ int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
         unsigned int invert = mc->invert;
 
         if (snd_soc_volsw_is_stereo(mc))
-                dev_warn(widget->dapm->dev,
+                dev_warn(codec->dapm.dev,
                          "ASoC: Control '%s' is stereo, which is not supported\n",
                          kcontrol->id.name);
 
         ucontrol->value.integer.value[0] =
-                (snd_soc_read(widget->codec, reg) >> shift) & mask;
+                (snd_soc_read(codec, reg) >> shift) & mask;
         if (invert)
                 ucontrol->value.integer.value[0] =
                         max - ucontrol->value.integer.value[0];
@@ -2654,9 +2664,7 @@ EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
         struct snd_ctl_elem_value *ucontrol)
 {
-        struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-        struct snd_soc_dapm_widget *widget = wlist->widgets[0];
-        struct snd_soc_codec *codec = widget->codec;
+        struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
         struct snd_soc_card *card = codec->card;
         struct soc_mixer_control *mc =
                 (struct soc_mixer_control *)kcontrol->private_value;
@@ -2670,7 +2678,7 @@ int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
         struct snd_soc_dapm_update update;
 
         if (snd_soc_volsw_is_stereo(mc))
-                dev_warn(widget->dapm->dev,
+                dev_warn(codec->dapm.dev,
                          "ASoC: Control '%s' is stereo, which is not supported\n",
                          kcontrol->id.name);
 
@@ -2684,7 +2692,7 @@ int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
 
         mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
 
-        change = snd_soc_test_bits(widget->codec, reg, mask, val);
+        change = snd_soc_test_bits(codec, reg, mask, val);
         if (change) {
                 update.kcontrol = kcontrol;
                 update.reg = reg;
@@ -2715,12 +2723,11 @@ EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
         struct snd_ctl_elem_value *ucontrol)
 {
-        struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-        struct snd_soc_dapm_widget *widget = wlist->widgets[0];
+        struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
         unsigned int val;
 
-        val = snd_soc_read(widget->codec, e->reg);
+        val = snd_soc_read(codec, e->reg);
         ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & e->mask;
         if (e->shift_l != e->shift_r)
                 ucontrol->value.enumerated.item[1] =
@@ -2765,7 +2772,7 @@ int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
 
         mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
 
-        change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
+        change = snd_soc_test_bits(codec, e->reg, mask, val);
         if (change) {
                 widget->value = val;
 
@@ -2854,12 +2861,11 @@ EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
         struct snd_ctl_elem_value *ucontrol)
 {
-        struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-        struct snd_soc_dapm_widget *widget = wlist->widgets[0];
+        struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
         unsigned int reg_val, val, mux;
 
-        reg_val = snd_soc_read(widget->codec, e->reg);
+        reg_val = snd_soc_read(codec, e->reg);
         val = (reg_val >> e->shift_l) & e->mask;
         for (mux = 0; mux < e->max; mux++) {
                 if (val == e->values[mux])
@@ -2918,7 +2924,7 @@ int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
 
         mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
 
-        change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
+        change = snd_soc_test_bits(codec, e->reg, mask, val);
         if (change) {
                 widget->value = val;